M18 Pins | McMaster-Carr

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	System of Measurement System of Measurement

Metric

	Thread Size Thread Size	Show

M18

	Thread Size Thread Size	Hide

	Thread Pitch Thread Pitch

1.5 mm

2.5 mm

	Length Length

18mm

	Pin Type Pin Type

	Quick Release

	For Pin Diameter For Pin Diameter

10mm

	Mount Type Mount Type

	Threaded Body

	Mounting Flange Shape Mounting Flange Shape

Round

	Material Material

Stainless Steel

Steel

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Maximum Spring Force Maximum Spring Force

33 lbs.

45 lbs.

	Body Length Body Length

18 mm

	Passivation Passivation

Passivated

	Usable Length Reduction Usable Length Reduction

5mm

	Barrel OD Barrel OD

18mm

	Head Length Head Length

16 mm

	Maximum Head Movement Maximum Head Movement

1.6mm

	Head Diameter Head Diameter

10mm

	Body Material Body Material

Steel

	Head Finish Head Finish

Zinc Plated

	Minimum Spring Force Minimum Spring Force

Not Rated

	Body Diameter Body Diameter

16mm

	Head Material Head Material

Steel

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6 Products

Thread-In Receptacles for Quick-Release Pins

Use a screwdriver to install these receptacles in a threaded hole. Use them to secure quick-release pins when you can't drill a through hole. They're made of 18-8 stainless steel for a balance of strength and corrosion resistance, and passivated for added protection against corrosion and oxidation.

For technical drawings and 3-D models, click on a part number.

Metric
For Pin Dia.	Barrel OD	Overall Lg.	Usable Lg. Reduction	Thread Size	Thread Pitch	Material		Each
10mm	18mm	18mm	5mm	M18	2.5mm	18-8 Stainless Steel	000000000	000000

Threaded Spring-Loaded Guide Pins

Threading makes these guide pins easier to remove and replace than press fit, so they're useful for high-wear applications. A sealed top prevents debris from getting inside and making them seize up. As the workpiece pushes against the pin head in one direction, the internal spring pushes back to hold it in place for clamping.

Guide Pins
Thread		Body		Head								Installation Tools
Size	Pitch, mm	Dia., mm	Lg., mm	Dia., mm	Lg., mm	Max. Head Movement, mm	Max. Spring Force, lbs.	Body Dia. Tolerance, mm	Body Material		Each		Each
Zinc-Plated Steel Head
M18	1.5	16	18	10	16	1.6	33	-0.15 to 0.15	Steel	0000000	00000	0000000	000000
M18	1.5	16	18	10	16	1.6	45	-0.15 to 0.15	Steel	0000000	0000	0000000	00000

Threaded Plug Gauges with Calibration Certificate

These gauges come with a certificate of calibration traceable to NIST that states they’ve passed a test for accuracy. They allow you to inspect internal threads on parts. All have a go gauge on one end and a no-go gauge on the other end. A taperlock handle lets you quickly replace worn gauges.

Check the minimum internal thread size with the go gauge end, and check the maximum internal thread size with the no-go gauge end. A part is within tolerance if it’s easy to thread the go gauge into the part but difficult to thread the no-go gauge more than two turns.

Threads have different classes of fit. Thread fit designates the tightness or looseness of mating threads. For example, inch threads with a 3B fit have tighter tolerances than threads with a 2B fit.

Metric

					Class 6H
Thread Size	Pitch	Pitch Dia. Tolerance	Hardness	Material		Each
Class X
M18	1.5mm	-0.008" to 0.008"	Rockwell C70	Chrome-Plated Tool Steel	00000000	0000000

Threaded Plug Gauges

These have a go gauge on one end and a no-go gauge on the other end. They allow you to inspect internal threads on parts. A taperlock handle lets you quickly replace worn gauges.

Threads have different classes of fit. Thread fit designates the tightness or looseness of mating threads. For example, inch threads with a 3B fit have tighter tolerances than threads with a 2B fit.

Metric

Class X
Thread Size	Pitch	Pitch Dia. Tolerance	Hardness	Material	Thread Fit		Each
M18	1.5mm	-0.008" to 0.008"	Rockwell C70	Chrome-Plated Tool Steel	Class 6H	000000000	0000000